EffectDemo/app/src/main/res/layout/item_device.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv_name_item"
        android:text="sheb"
        android:layout_centerInParent="true"
        android:textSize="20sp"
        android:gravity="center"
        android:layout_width="200dp"
        android:padding="30dp"
        android:layout_height="wrap_content"/>
</RelativeLayout>